Strap-tightener tool



Aug. 7, 1923. 1,463,870

L. CAMPBELL STRAP TIGHTENER TOOL Filed June 27. 1921 Patented Aug, 7,llQZEK r eh,

LAYABJD CAMPBELL, OF HEX/V YORK, N. Y,, .ASSIGNOR, BY MESNEASSIGITIWENTS, TO TWIST SEAL COMPANY, OF CHICAGO, ILLINOIS, ACORPORATION OF DELAWARE.

STRAP-TIGI-ITE1JEEE TOOL.

Application filed June 27,

To all to 710m it may concern Be it known that I, LAYARD CAMPBELL, acitizen of the United States, and a resident of the city of New York,borough of Mana hattan, county and State of New York, have inventedcertain new and useful, Improvements in Strap-Uiightener Tools, of whichthe following is a full, clear, and exact dey scription.

Among the principal objects which the present invention has in view are:To take up the slack in wire straps fastened on cases or cartons fortransportation, which slack results in part from the operation of thetools for fastening the straps; to simplify the method of performing theoperation;

and to reduce the labor factor thereof.

Drawings.

Figure 1 is a plan view showing a package reinforced by a wire strap anda tightening loop formed thereon by the tool the subject of the presentinvention;

Figure 2 is a bottom end view of a tool 2% constructed and arranged inaccordance with the present invention, showing in conjunction therewitha fragment of a wire strap disposed as in the initial position as sumedwhen forming a tightening loop;

Figure 3 is a similar view showing the tool in the position assumed.thereby at the beginning of the operation of forming the loop; t

Figure 4c is a similar view showing the tool as in position for furtheradvance in the operation of forming the loop, the riding cams havingdepressed and passed over the body of the wire to lift the loopsthereabove;

Fig. 5 is a similar view showing the tool in the position at thecompletion of the tightening loop;

Figure 6 is a detail view on enlarged scale showing a side view of theoperating end of the tool;

Figure 7 is a detail view in perspective and on enlarged scale, showingthe tightening loop formed by the said tool;

Figure 8 is a side elevation of the tool constructed and arranged inaccordance 1991. Serial No. 480,505.

with the present invention in operating poi Description.

When forming the sealing tie such as indicated by the numeral 15, thewire strap l6 is usually taken up so that when the tie s completed acertain amount of slack exists in the strap. This has been founddisadvantageous, in that it permits the Wire to be used as a means forlifting the package, thereby further stretching the wire and increasingthe slack therein, and the same is apt to loosen enough to permit it tobe shifted on the package. Some packages, such as packages of shingles,require closer binding-one without any play in the strap, When itbecomes necessary to tighten the strap the tool shown in the drawings,having a head 17 which is provided with two pins 18 set out from thesurface, is adjusted on the strap 16, so that the same passes betweenthe said pins in the manner shown in Figure 2 of the drawings. The head17 is preferably provided with a turning handle 19. This may, however,be dispensed with, and pliers r other forms of the usual workmans kitmay be employed for grasping and turning the head 1'7. The heads 17 areusually provided with lugs 20, the under surface of which is inclined orcam shaped, the purpose being to over-ride the strap 16 when the tool ismoved from the position shown in Figure 3 to the position shown inFigure -l. By so over-riding the wire beyond the loops 21 formed by thewire wrapped on the pins 18, each of the said loops is permitted to passabove the wire, and over the same, until each of the loops wrapped aboutthe throat of the adjacent loop, so that the wire composing the strap 16is twisted upon itself in a manner shown in Figure 7 of the drawings. Itwill be understood that the loops 21 are twisted to the position shownin the drawings by less than a complete revolution of the head 17.Therefore, the operation of the tool is very rapid.

If one set of the loops 21 does not prove Claims.

1. A tool as characterized comprising a plurality of devices forengaging wire at opposite sides thereof; means for gyrating said devicesabout a common center to form oppositely extended loops in said wire,and a projection having an inclined surface associated with each of saiddevices, and arranged to remove the body portion of the Wire from thepath of said devices to permit the loops formed thereby to pass over thebody portions of the wire.

2. A tool as characterized comprising a plurality of devices forengaging wire at opposite sides thereof; means for gyrating said devicesabout a common center to form oppositely extended loops in said wire;and means for engaging said wire adjacent said devices for removing theengaged portion of said wire from the path of said devices to permit theloops formed thereby to pass over the body of said wire.

3. A tool as characterized comprising a plurality of devices forengaging wire'at opposite sides thereof; means for gyrating said devicesabout a common center to form oppositely extended loops in said wire;and means for engaging said wire adjacent said devices for removing theengaged portion of said wire from the path of said devices to permit theloops formed thereby to pass over the body of said Wire, said meansembodying a plurality of cams, each cam being spaced apart from saiddevices and shaped to depress the body of said wire from the normallevel thereof.

4. A tool as characterized comprising a head; a plurality of pinsmounted thereon in spaced relation to the center thereof; a plurality ofcam shaped lugs mounted on said head in spaced relation to said pins,the advancing surface of said lugs being inclined backward; and meansfor rotating said head.

5. A tool as characterized comprising a head; a plurality of pinsmounted thereon in spaced relation to the center thereof; a plurality ofcam shaped lugs mounted on said head in spaced relation to said pins,the advancing surface of said lugs being in clined backward; and meansfor rotating LAYARD CAMPBELL

